Pump-valve



(No Model.)

G. PARKER. PUMP VALVE.

No. 569,884. Patented Oct. 20, 1896.

INVENTOR WITNESSES:

UNITED STATES PATENT OFFICE.

GEORGE PARKER, OF VVHITING, INDIANA.

PU M P-VALVE.

SPECIFICATION forming part of Letters Patent No. 569,884, dated October 20, 1896.

Application filed June 12, 18%. Serial No. 595,268, (No model!) To aZZ whom it may concern.-

Be it known that I, GEORGE PARKER, of Whiting, in the county of Lake and State of Indiana, have invented a new and Improved Pump-Valve, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved pump-valve which is simple and durable in construction, not liable to get out of order, and arranged to securely hold the valve-disk to its place by the force of a spring completely inclosed in such a mannor that in case the spring breaks the pieces thereof are confined, and hence are not liable to injure the working parts of the machine on which the valve is used.

The invention consists principally of a valve-disk provided with a hub fitted to slide on a fixed valvestem, a casing extending from the head of the said stem and into the open end of which extends one end of the said hub, and a spring coiled on the said stem within the casing and interposed between the said head and the said hub.

The invention also consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference inclicate corresponding parts in both the views.

Figure lis a sectional side elevation of the improvement, and Fig. 2 is a sectional plan view of the same on the line 2 2 of Fig. 1.

The improved purnpwalve is provided with a valve-disk A, made of hard rubber or other suitable material, and adapted to be seated on a valve-seatB,as plainly indicated in Fig.1.

The valve-disk A is provided on its outer face with a metallic plate G, provided with a tube forming a hub O for the valve-disk, the said hub being fitted to slide on the valvestem D, secured in the usual spider or other part of the valve-seat, as indicated in Fig. 1.

The upper end of the valve-stem D is formed with a head D, from which extends a casing or a shell D concentric with the valve-stem, the said casing containingthe spiral spring E, coiled on the stemD and resting with its upper end on the under side of the head D and with its lower end on a flange 0, formed on the upper end of the hub O. This outer end or flange O of the hub extends into the open end of the casing or shell D as plainly shown in Fig. 1, so that the force of the spring E is transmitted to the hub of the valve-disk A to hold the latter normally to its seat B.

Now it will be seen that by the arrangement described the disk-valve A is adapted to readily open by the pressure of the water on the under side of the disk, the latter being properly guided in its upward movement by the hub C on the stem D, and at the same time the spring E is compressed to cause a proper closing of the valve-disk A as soon as the pressure on the water ceases.

It is evident that the spring E iscornpletely confined within the shell or casing D and consequently the spring is not liable to corrosion by the action of the liquid passing through the valve-seat. It is further evident that in case the spring breaks the pieces thereof cannot pass out of the casing, as the lower end thereof is closed by the flange G on the hub, and consequently the pieces of the spring do not passinto the working parts of the machine to injure the same, as is so frequently the case with the pump-valves as now constructed.

It is understood that the opening of the disk A is limited by the distance between the plate 0 and the lower open end of the casing D By the arrangement of the rubber disk A, backed by the metallic plate 0, and the valve stem D a direct perpendicular movement of the valve A is secured, thereby preventing the lodgnient of any foreign matter or obstruc tions under the valve A, which is a common occurrence in all valves now in use. It will also be seen that the space over the valvestem 1) and under the head D and the casing or shell D forms an air-chamber or cushionpocket which gives easy movement and assists in the quick closing of the valve A.

Having thus described my invention, I claim as new and desire to secure by Letters Patent---- 1. A pump-valve, comprising a valve-disk having a hub consisting of a thin cylinder having an external flange of larger radius on its outer end, a fixed valve steln on which slides the said hub, a casing surrounding the valve stem attached to the outer end thereof drical easing fixed to the head and surrounding the stem leaving an annular spacejust suffioient to receive the flanged end of the hub,

and a spiral coiled spring within the annular space between the casing and stem and pressing upon the head of the valve-stem and the flanged end of the valve-hub, substantially as described.

GEORGE PARKER. \Vitnesses:

MICHAEL HASSON, WIL IAM BRUCE GIBSON. 

